CONCORD, N.H. (AP) — Lawyers for a man convicted of slashing a woman to death with a machete and maiming her 11-year-old daughter during a home invasion want to have his life sentence reduced.

Steven Spader of Brookline was convicted in the 2009 Mont Vernon home invasion and killing of 42-year-old Kimberly Cates, which occurred a month before he turned 18. He was given a mandatory sentence of life without parole.

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His lawyers are asking for a new sentencing hearing in light of a recent U.S. Supreme Court ruling that mandatory life sentences for those under 18 at the time of the crime are unconstitutional.

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Spader’s lawyers are also asking the New Hampshire Supreme Court to put his appeal on hold pending the outcome of his motion.

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Copyright 2012 The Associated Press.